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Figure 8
Five class averages used for random startup (top row of Fig. 7[link]) and the corresponding reprojections from the three-dimensional reconstruction. A good correspondence of the class averages to their reprojections is a necessary condition for a valid reconstruction procedure.

IUCrJ
Volume 4| Part 5| September 2017| Pages 678-694
ISSN: 2052-2525
https://doi.org/10.1107/S2052252517010922